58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/* -*- C++ -*-
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* Serene Programming Language
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*
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* Copyright (c) 2019-2022 Sameer Rahmani <lxsameer@gnu.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LLVM_PATCHES_H
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#define LLVM_PATCHES_H
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#include <llvm/ADT/DenseMap.h>
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#include <llvm/ADT/Hashing.h>
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namespace llvm {
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// Our specialization of DensMapInfo for string type. This will allow use to use
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// string
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template <>
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struct DenseMapInfo<std::string> {
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static inline std::string getEmptyKey() { return ""; }
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static inline std::string getTombstoneKey() {
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// Maybe we need to use something else beside strings ????
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return "0TOMBED";
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}
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static unsigned getHashValue(const std::string &Val) {
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assert(Val != getEmptyKey() && "Cannot hash the empty key!");
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assert(Val != getTombstoneKey() && "Cannot hash the tombstone key!");
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return (unsigned)(llvm::hash_value(Val));
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}
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static bool isEqual(const std::string &LHS, const std::string &RHS) {
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if (RHS == getEmptyKey()) {
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return LHS == getEmptyKey();
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}
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if (RHS == getTombstoneKey()) {
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return LHS == getTombstoneKey();
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}
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return LHS == RHS;
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}
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};
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} // namespace llvm
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#endif
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